Payroll Here are the summary statistics for the weekly payroll of a small company: lowest salary = +300, mean salary = +700, median = +500, range = +1200, IQR = +600, first quartile = +350, standard...

Payroll Here are the summary statistics for the weekly payroll of a small company: lowest salary = +300, mean salary = +700, median = +500, range = +1200, IQR = +600, first quartile = +350, standard deviation = +400.

 a) Do you think the distribution of salaries is symmetric, skewed to the left, or skewed to the right? Explain why.

 b) Between what two values are the middle 50% of the salaries found?

 c) Suppose business has been good and the company gives every employee a $50 raise. Tell the new value of each of the summary statistics.

d) Instead, suppose the company gives each employee a 10% raise. Tell the new value of each of the summary statistics.